Threat intelligence

WooCommerce Subscription < 9.1.0 - Unauthenticated PHP Object Injection

CVE-2026-18391 · woocommerce-subscriptions

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Woocommerce Subscriptions at a vulnerable version. How SiteRespond intelligence works

Vulnerability: WooCommerce Subscription < 9.1.0 - Unauthenticated PHP Object Injection
Affected software: woocommerce-subscriptions(Plugin)
Affected versions: < 9.1.0
Authentication: Unauthenticated
Vulnerability type: Other
CVE: CVE-2026-18391
Published: 14 August 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory adb4d326-7089-4292-bf0a-4a21e6928a2d). Methodology and redistribution notes

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